The sort of formal surname name more popular in another era; Dalton's a more modern relation. 

Alton

Barnabas, whose birth name was Joseph, was one of the earliest Christian disciples in Jerusalem, who undertook missionary journeys with Paul the Apostle, His name is a bit Old World compared to the update Barnaby, but could gain some attention as boys' names ending in 's' are enjoying a comeback.


Barnabas

Barnaby, a genial and energetic name with an Irish-sounding three-syllable lilt, is an ancient appellation that manages to be both unusual and highly attractive and deserves to be used more than it is. A sweet-spot name that's a real winner.
 Barnaby is a version of Barnabas, the name of an Apostle companion of St. Paul on his missionary journeys. Barnaby has NEVER ranked on the US Top 1000, though it is on the charts in the UK and is well-liked by Nameberry visitors.
 The name of the good-natured hero of Dickens's novel Barnaby Rudge, it became more familiar to the modern American public through the TV series Barnaby Jones. Barnaby has been a character in Hello, Dolly!, a doctor played by Cary Grant in the movie Monkey Business, a comic strip character, and has starred in a number of children's books.

Barnaby

A neglected surname name that could substitute for the more common Gordon, which has in the past associated with the milk company and Elsie the Cow. 

Borden

Bendigo

Bolt

Chancy

Clay is a rich, earthy one-syllable name with a southern-inflected handsome-rogue image, featured on soap operas and reality TV. Its longer forms are Clayton and Clayborne. 
 There have been TV characters called Clay on The Wire, Sons of Anarchy, and 13 Reasons Why, and the name's most prominent recent bearers are American Idol Clay (born Clayton) Aiken and Green Bay Packer linebacker Clay (born William Clay) Matthews.

Clay

Cullen is an appealing Irish surname name that upped its cool factor considerably when it became the Twilight family name of Edward et al. It's considerably less popular than it was at its peak in 2010, but is still widely used. 
 Cullen Jenkins was a defensive tackle for the Green Bay Packers and Philadelphia Eagles.

Cullen

Caxton

Colborn

A simple one-syllable name that has been on the popularity list since the mid-1980s, Drake is most associated today with the single-named rapper (born Aubrey). The name peaked at Number 197 in 2010 and has since been on a slow decline, but it still can be counted among the stylish contemporary <a href="https://nameberry.com/search/boys-names/d">boy names starting with D</a>.

Drake

Echo, the pretty, resonant name of a legendary nymph, was the heroine of Joss Whedon's sci-fi series Dollhouse. Nick Hexum, of the band 311, named his daughter Echo Love.
 In the Greek myth, Echo was a nymph whose unrequited love for Narcissus caused her to fade away until all that was left was the sound of her voice. Obviously, a name with a lot of reverberations.

Echo

There is a whole new species of bird names open to the baby namer, from the light and feminine Lark to the sleek and powerful Falcon. 

Falcon

Fallon was one of the first of the unisex surname names, but thanks to "Dynasty" in the 1980s it now has a feminine image.  For a boy, try Phelan instead. 

Fallon

Flint is one of the new macho names on the rise today, part old-school tough guy, part rebel. You won't find a tougher, steelier-sounding name; it's part of a genre on the rise along with cousins Slate, Stone and Steel. 
 Flint found itself on the popularity list for a few years in 1959-60, but would prove a distinctive choice today.
 Flint has superhero overtones--there's one in "Spiderman"--aka Sandman--and Captain Flint was a Marvel comic, and Flint is both a legendary pirate and a parrot in Robert Louis Stevenson's Treasure Island. But on the softer side, there's also inventor Flint Lockwood in Cloudy With a Chance of Meatballs.

Flint

Flagan

A rare but distinguished Scottish name. The original Galloway is a region in south-west Scotland, and the meaning ("stranger-Gaels") refers to its mixed population of Scandinavian and Gaelic-speaking people. It later became a surname and a sturdy breed of cattle. Galloway could be a fresh addition to better-known Scottish places like Murray and Ross. 

Galloway

Hardy is a spirited and durable un-Germanic German surname that is starting to be used in this country. 
 British fashion designer Hardy Amies (born Edwin) is its best known bearer, and Thomas Hardy could make a literary namesake--as might the old Hardy Boys series of adventure books for young boys.

Hardy

An Old World name that might have a chance to rise again with other ancient and worldly forms. Be sure to say yo-HAHN-es.

Johannes

More commonly spelled JUDD, this is a strong but sensitive short form that can easily stand on its own.

Judson remained in the US Top 1000 every year until it dropped off in 1987. In 2014, the named rejoined the list. With Hudson gaining in popularity, Judson—a possible alternative to Justin—could follow its path. 

Judson

Jubelain

Kearney

According to exclusive Nameberry data, Logan is officially the Number 1 gender-neutral name in the US, but that statistic is somewhat misleading given that nearly 90 percent of the baby Logans born in 2023 were boys.
 
Logan started climbing in the mid-70s and shot up to the Top 5 for boys in 2017. Now, Logan's popularity has settled back down to the boys' Top 50 in the US and the Top 100 in other English-speaking countries.
 The mutant character Wolverine, known as Logan, based on the X-Men comics and played by Hugh Jackman on film, has had a considerable impact on the name. There were also attractive guys named Logan on Veronica Mars and Gilmore Girls, though Succession patriarch Logan Roy may have given the name a harder edge.
 
Logan originated as a Scottish surname which was derived from a place of that name in Ayrshire. The place name came from lagan, a Scottish Gaelic diminutive of lag, meaning "hollow." Alternate spellings include Logon, Logen, and Logyn, which is more common among girls.
 Logan is used for girls less often now than it was in the mid-nineties. A little over ten percent of the baby Logans today are female, down from about 15 percent in 1995.

Logan

What with Mason scooting up the charts, this attractive place-name, with its thick Georgia accent, could make a more distinctive alternative.
 Macon has played major roles in two novels, Anne Tyler's The Accidental Tourist and Toni Morrison's Song of Solomon, in the latter as both a Macon Sr. and Jr.

Macon

Milo is most commonly considered to be Germanic name derived from the Latin word miles, meaning "soldier." However, there is evidence to suggest it also may have independently spawned from the Slavic root milu, meaning "merciful." Milo predates brother name Miles, a variation that evolved when the name immigrated to the British Isles in the Middle Ages. Mylo is an alternate spelling.
 
Milo has long been a favorite <a href="https://nameberry.com/boys-names">boys' name</a> on Nameberry, also getting some well-deserved appreciation in the wider world. Milo combines the strength of the ancient Greek Olympic wrestler of that name—a six-time winner of the Olympic games—with the debonair charm of a WWII RAF pilot.
 More recently, Milo has been associated with the dashing Milo Ventimiglia of This Is Us fame, and it has also been the name of characters in books Catch-22 and The Phantom Tollbooth, and on screen in Milo and Otis, Alias, and Atlantis: The Lost Empire.
 Ricki Lake, Camryn Manheim, Sherry Stringfield, Liv Tyler, Craig Ferguson, and Alyssa Milano are six celebrity parents who share our enthusiasm for Milo, as do many Nameberry baby namers.
 Milo is often heard in Ireland. Milo O'Shea was a renowned Irish character actor.

Milo

Sweet and charming French nickname for Anne, à la Manon for Marie. 

Ninon

With a cool color meaning and a woodsy, earthy feel, this anglicized spelling of the Irish name Odhrán could rise in popularity thanks to Olympic rugby player, Orrin Bizer. The name did rank in the US Top 1000 in the late 1800s and the early 20th century, but has been out of the charts since the 60s. 

Orrin

Parmalee

Ridge may be the quintessential daytime drama name, but it's still better than most. This is one word name rising rapidly through the ranks, reentering the US Top 1000 in 2015 for the first time since 1989.

Ridge

Despite its somewhat menacing meaning, this name has been widely used in recent years, probably due to the appeal of its trendy on ending. 

Talon

Tannen

Undoubtedly inspired by country singer Trace Adkins, it has dropped in recent years.

Trace

Tyrel

Tatton

Vittoro

Yance

fieldpetal's list "Louis L’Amour Cowboy Character Names" of 38 great name ideas: Alton - Yance!

Louis L’Amour Cowboy Character Names

I found some interesting cowboy names from Louis L'Amour's books. Some are last names, most are first names.